Finding the Fourth Proportional to 1,441.15, 1,988.81 and 851.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,441.15 : 1,988.81 = 851.69 : x
2. Step 2: Convert to fraction form
   1,441.15/1,988.81 = 851.69/x
3. Step 3: Cross multiply
   1,441.15x = 1,988.81 × 851.69
4. Step 4: Simplify right side
   1,441.15x = 1,693,841.77
5. Step 5: Solve for x
   x = 1,693,841.77/1,441.15
6. Step 6: Final answer
   x = 1,175.34